Unable to find the right path, need help || ITR filing

Hello,

Me and my friend have run a partnership firm (LLP) and own a registered GST number for the LLP.

Both of us are directors.

The firm is 1.5 year old and has not done any business more than 5 Lacs per annum.

We file our GST regularly. 

My queries are:

1. If one of us start to work in an MNC as a salaried employee, do we need to shut down the business? If we continue the LLP firm, does it amount to any fraud or criminal offence?

2. Can the same pan card be used in ITR filing as a salaried employee and director of an LLP firm?

3. What are the different ITR forms, which needs to be filed for such an arrangement?

Thanks... Joshiji