26qb need amendment without AO

Dear All

I need to amend 26qb. I tried last time and went to AO, so cancelled the request . I want to avoid request going to AO. 

I need to change the installment/lumpsum. Was installment and to be changed to lumpsum. Value paid will also change 

And consideration value (I can skip as values are near)

Can I skip if I get a dsc or would like to go to seller or it is mandatory to have these go AO based on the category/quantum of changes

 I need some expert advice and wanti avoid AO at all cost