HMRC Admin 20 Response

Hi,
There are 2 different gains to be reported here as there is the one for 2016 if your wife did not live in the property, then the gain for the property bought in 2016 and now sold.
Thank you. 

Hi,
We are sorry to hear about your experience and regret any inconvenience caused.
Unfortunately we are unable to offer call backs via this forum.
If you would like to file a complaint you can do so here: Complain about HMRC
Thank you.

Hi,
The postcode you have referenced is the correct address for form CWF1 to be sent in order to register for Self Assessment and Class 2 National Insurance.
The guidance on how to register for Self Assessment can be found here:  
Check how to register for Self Assessment
Thank you.

Hi,
You are liable for the underpayment, PAYE is Income Tax which is deducted and paid to HMRC on your behalf by your Employer.
The other way to pay Income Tax is Self-Assessment.  
It is your responsibilty to check your tax coding is correct.
You can find more information here: Tax codes
Thank you.

Hi,
It will be a single pool - 4. How to work out the gain for shares in a Section 104 holding
Thank you.

Hi,
Unfortunately, we are unable to provide specific advice tailored to individual circumstances on this forum.
You you may wish to engage the services of a professional advisor/accountant to assist with your enquiry.
Thank you.

Hi,
You have the full threshold in the tax year in which the pension is paid.  
It will be from the following year that the threshold will reduce to the minimum tapered annual allowance of £10000.
Thank you.
 

Hi,
After the 3 extra payments have been made, your pay should revert to what it was before and the tax deducted each month should be the same as before.  
A cumulative tax code calculates the tax payable on your earning to date and the tax you pay is the difference between this calculation and the tax to date for the previous month.
Thank you.

Hi,
By gifting the house you are disposing of it and as such it is seen as a captial gain and liable to tax if there has been an increase in its value. 
If the property was your only and main residence for the whole period prior to making the gift then no tax will be due.
Thank you.

Hi,
Please refer to Tax on foreign income
Thank you.