HMRC Admin 19 Response

Hi,
A personal UTR is required to file a tax return. If you do not have a UTR, you can apply for one here:
Check how to register for Self Assessment
Thank you.

Hi,
Please contact our online services team who should be able to help with information you need to confirm your identity.
Technical support with HMRC online services
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Hi.
You can see guidance below, as the method of payment determines the date:
Deemed date of contributions
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Hi,
As we would need to access your record to check the calculation you will need to contact our Self Assessment team.
Self Assessment: general enquiries
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Hi,
Yes, it is.
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Hi,
You can see guidance here:
EIM32075 - Travel expenses: travel for necessary attendance: definitions: temporary workplace
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Hi,
No, it will not be taxed twice as on the Self Assessment you declare the tax deducted at source by your employer which will include the tax collected on the benefit in kind in your tax code. 
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Hi.
You can see guidance here: 
Tax on your private pension contributions
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Hi,
You can see guidance here:
HS281 Capital Gains Tax civil partners and spouses (2024)
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Hi,
No, as you will have already claimed relief to buy the inventory.
Thank you.