Error message shown in system

Hello, I have an error shown in the system "As I have already made three attempts to match your Recipient details, you cannot select to transfer your Marriage allowance on this return." Can I know how to add the "Marriage allowance" back on my 2022-23 tax return? And, what is the meaning of "Delete your entire tax return" at the bottom of 1st page? If I choose it, does it mean that I cannot submit the tax return online for 2022-23? Is there a way to clear all entries and to fill the return from the 1st page? Thank you.

Hi Karen,
If not allowing you to submit the Marriage Allowance transfer you will need to contact HMRC to check what information is not matching.
Self Assessment: general enquiries
If you click on delete your entire tax return it will remove the tax return you are currently completing and you would need to start from the beginning of the tax return again. 
Thank you.