Applicability of sec 44ad

There is no confusion in it. Go ahead declaring 8% as income. The provision you are referring to is as follows:

If income declared under PGBP is less than 8% of gross receipts and Total income including income under other heads is above basic exemption, then the assessee has to maintain books and get them audited under section 44AD

you have no limitation in declaring 8% or higher amount as profits

Thanks a lot