Where were you filing ITR 1 for all this year's if you were an NRI.
Now for current year file your return as ITR 2 and mention yourself as NRI and you can't do anything for previous year's return for now so just wait.
If your tenant is making a foreign payment then she needs to file form 15CA otherwise not. If she has been making payment to your indian bank account i.e. NRO account she is not required to file 15CA.
Also technically she needs to deduct TDS u/s 195.
This situation has a lot of if and but so it would be better if you can hire a CA in India.
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