Which return form should be used

HELLO FRIENDS,

suppose a person x has less than 8% of his total sales of Rs. 5000000 as his net profit.

as per 44AD he will have to get his accounts audited if he wants to show net profit less than 8% .

now my question is that in such case which return form will be used by x for filing his return of income ???

will it be ITR4 OR ITR4S ??????

AND also tell me whether such audit of accounts done by a chartered accountant in the above mentioned case be counted for his total limit for 45 tax audits????

plz help

thanking in anticipation.