To pay self-assessment tax in the UK, follow these steps: 

1. Calculate Tax Liability: Determine the amount of tax you owe based on your self-assessment tax return. 
2. Payment Methods: There are several ways to pay:  
3. Online: Pay through the HMRC website using a debit/credit card or bank transfer. 
4. Direct Debit: Set up a direct debit for future payments. 
5. Bank Transfer: Use your bank’s online or telephone banking service. 
6. Pay by Post: Send a check to HMRC with the payment slip from your tax bill.
7. Payment Deadlines: Ensure you pay by the due dates to avoid penalties and interest charges. 
8. Keep Records: Keep records of your payments and relevant tax documents for future reference.

To claim tax relief on a self-assessment form in the UK, follow these steps: 

1. Identify eligible expenses for tax relief. 
2. Complete the self-assessment form (SA100) accurately. 
3. Enter claimed amounts for eligible expenses in the appropriate sections. 
4. Attach supporting documents like receipts. 
5. Submit the form and required documents to HMRC before the deadline. 
6. Await confirmation from HMRC regarding any tax adjustments or refunds. 
7. Keep copies of the submitted form and documents for record-keeping. 

1. Calculate eligible working-from-home expenses, e.g., utility bills, internet, office supplies. 
2. Choose between simplified expenses (e.g., £6 per week) or itemizing actual expenses if well-documented. 
3. Complete the self-assessment form (SA100) and enter the total amount claimed under allowable expenses. 
4. Provide a brief explanation of the calculation of the actual expense if chosen. 
5. Submit the self-assessment tax return and required documents to HMRC by the deadline. 
6. Retain records of expenses and supporting documents for future reference. 

 
The deadline for filing your Self-Assessment tax return is 31 January each year. For the tax year 2021-22, the due date to submit your taxes is 31 January 2023. It’s crucial to meet this deadline to avoid penalties and interest charges. Make sure to prepare and submit your tax return promptly to stay compliant with HMRC regulations.