Should i cancel Marriage allowance now?

Good morning, I am going to start regular employment in September. The pay is not confirmed yet but should be close to 28k per year. I am doing a few hours of self employed work since 19 March this year, for which I haven't been paid yet. This should be around £800. This self employed work is only till end of May. When should I cancel my marriage allowance?! Please advise.

Hi Murphy,
If you are transferring the allowance and will earn above the personal allowance £12570 then as no benefit to the transfer you can contact HMRC to remove Income Tax: general enquiries.
Thank you.