44ada to normal return

For opting out of sec. 44ADA and again opting in, there is no restriction like that in sec. 44AD.

So, no audit applicable if 50% or more margin is declared under normal assessment.

Your original query is for section 44ADA........... and not for sec. 44AD...

Both sections are different.

The five year rule applies to sec. 44AD (6/8% margin) which is applicable for eligible businesses.

The same (5 years rule) is not applicable to sec. 44ADA (50% margin), which is applicable in case of specified professions.

Most Welcome..                 

For specified professions sec. 44ADA can be opted. Eligible for total receipts upto 50 lakhs.

There is no restriction of 5 years for such profession under sec. 44ADA.  They can opt in and out of the presumptive assessment without any restriction every next AY.
Only restriction is minimum 50% profit margin, otherwise audit u/s. 44AB(d) of IT act.