Green card for my parents on B1 VISA

[squadri_76]

I am a green card holder and will be taking my citizenship this month.My parents are with me on a visitors visa and I want to file for thier green card after I recieve my citizenship.
I have a few questions regarding there change of status.
Can I file thier green card when they are on a visitor visa.
Can I file thier change of status even if thier time of 6 months of stay is over.
My parents came to U.S in the month of Dec and thier 6 months of visitors visa is expiring on Jun 12th.I am taking my citizenship on May 29th after which can can I file thier change of status even if ther overstay.
Please advise should I apply for an extension or should I directly apply for thier green card even if they are out of status cause I came to know that after interview it may take couple of weeks for the citizenship and my interview is on May29th and their visitors visa is expiring on Jun12th.

Thank you.

[peace]

Converting B1/B2 to green card is risky.Many parents do it but there is always a chance of problems at interview and one should not take an undue risk for such an important issue.

This is because B1/B2 requires a non-immigrant intent and at interview your parents may be asked questions to prove that they did not have an immigrant intent while entering US on a B1/B2. They may not be able to prove that.
They will be legal as long as their I-485 is in process even if their I-94 is expired. But , just in case it is denied , they won't even be able to enter on their visitor visa in future due to their overstay.

The best thing to do is Consular processing in India. They should leave US before their date on I-94 and you should file an I-130 when you become a citizen with an option for consular processing. This is the safest route.