Don't panic...you are fine.
Generally, when one files an I-485, s/he is considered to be in valid legal status in the U.S. As long as one's status was valid at the time of filing the I-485, there is no problem.
After that whether you work or not you remain in status. The only thing you need to take care of now is getting EVL, paystubs, W2s and/or Tax Returns to respond to RFE, if any.
One of the reasons they ask you for your W2s and Tax Returns is to check whether you are a tax payer or not. According to Immigration and Nationality Act you must be paying your taxes for them to approve your greencard.
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If you are an alien who has established residence in the United
States after having been admitted as an immigrant or adjusted
status to that of an immigrant, and are considering the filing of
a nonresident alien tax return or the non-filing of a tax return
on the ground that you are a nonresident alien, you should
carefully review the consequences of such actions under the
Immigration and Nationality Act.
If you file a nonresident alien tax return or fail to file a tax
return, you may be regarded as having abandoned residence
in the United States and as having lost your permanent
resident status under the Act. As a consequence, you may be
ineligible for a visa or other document for which permanent
resident aliens are eligible.
You may also be inadmissible to the United States if you seek
admission as a returning resident, and you may become
ineligible for adjustment of status as a permanent resident or
naturalization on the basis of your original entry.
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Hope this helps. Have fun.