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I have below two questions related to interest from buying US Treasury Bill (Zero coupon) and wait for maturity: Q1: when calculating the interest received by buying a US Treasury Bill (zero coupon) and wait for maturity, which one of the below is correct? (a) do we need to convert both the buying price and maturity price from USD to GBP individually (using USD.GPB currency conversion rates) to calculate the differences? Or (b) calculate the differences of buying price and maturity price in USD, then convert to GBP at maturity date? Q2: for buying a US treasury bill (zero coupon) at 2 different times and sell part of this bill and the rest wait for matured, which one of the below is correct when calculating the interest of the part wait for maturity? (a) to use the Section 104 pool price in GBP to calculate the interest part of waiting for maturity? or (b) use the average buying price in USD to calculate the interest then convert from USD to GBP at maturity date? Thanks.

Please ignore my above message. All clear now. Thanks.

I would take the above reply as a "Yes" to my question posted above related to whether I can mix the use of the rates of the links provided. Please correct me if I am wrong.

So, is it true that I can mix the use of the rates in the above links in the same tax year when reporting using Self Assessment? (Refer to my question 2 above). Thanks.

HMRC has currency exchange rates for (i) monthly rate (ii) average yearly rate published on 31 Mar (iii) average yearly rate published on 31 Dec I bought and sold several overseas securities for several times in a tax year, and need to file Capital Gain Please advise which of the below, 1 or 2, is correct? 1. I can choose only one of the (i), (ii) or (iii) above to calculate the purchase prices and disposal prices for a tax year, OR 2. I can mix and use any of the (i), (ii) or (iii) above for each individual purchase price and disposal price in the same tax year. (i.e. use (i) for calculating the purchase price of one security, and (ii) for calculating the selling price of the same security, when reporting CG in the same tax year.) Also, is there any guidelines for using the (i) and (ii) and (iii) above for calculating and reporting CG ? Thanks.

I filed the tax return for tax year 2022-2023, for both income and capital gain, using the online Self-Assessment System. I then paid the tax accordingly. Recently I found some mistakes of the Capital Gain part in this filed return (incorrect currency conversion rates were used to calculate the gains and purchased prices). Please advise: am I able to amend the filed tax return of 2022-2023 (the part of Capital Gain) by using the online Self-Assessment system? Thanks.

I bought and sold US stock using my US dollar saving. When reporting Capital Gain, please advise: 1. I can use the HMRC's monthly currency conversion rate at the selling date to calculate the purchasing price / disposal proceed / gain in Sterling? or 2. I need to use the HMRC's monthly currency conversion rate at the purchasing date to calculate the purchasing price, and use the monthly currency conversion rate at the selling date to calculate the disposal proceed? Please advise whether both are acceptable? or if not, which one should be used?

I have not use the pension allowance in previous 3 years. Is it true that I can use the pension allowance in this year and contribute more ? i.e. the maximum for contribute in SIPP is £2880 a year for annual salary < £3600, is it true that the contribution to SIPP this year can be £2880 x 4 = £11520, using the previous 3 years allowance plus this year's allowance?

Thanks for your reply. Understand the tax relief will be pay into my SIPP account. My questions is, whether the amount of income which I contribute to the SIPP account can be deducted from the income which I fill in the self assessment tax form? Thanks.

I am a basic tax payer. I wish to know whether the amount of income which contribute to the SIPP account will be exempted from income tax? (i.e. when calculating income tax, will the part contributed into SIPP be excluded as income which of calculating the income tax?) Thanks.