Hello,
You can file your returns under Section 44AD. It is not mandatory to show 8 or 6% profits but the minimum percent is 8%. You can very well show a higher percent. If in your case you are not in a position to prove your expenses by maintaining all the requisite documents, you can file your return u/s 44AD and then show a higher percent i.e 20-25% as your profits.
Trust this clarifies your query.
Feel free to call / get back in case of further clarifications.
Thanking You.
Regards,
Rohit R Sharma
BCOM, ACA, LLB-GEN, CERT. FAFP