Tax payment AY 22-23 sought for proofs of savings claimed. No proofs -want to pay NOW, ? head

filed the return for AY 22-23 Fy 21-22

Now sought for proof of the deductions claimed. 

Could not provide it. Now want to pay the difference. 

***** UNDER WHAT HEAD THIS AMOUNT HAVE TO BE REMITTED? ****

(TRIED UNDER SELF-ASSESSMENT TAX - payment failed) 

self assesment tax (300)

Other receipts (500)