Just checked the following information from 1-131 instructions. For me, I -485 pending, been here for 4.5 yrs, if I Claim Nonresident Alien Status on my Federal Income Tax Return, what will happen to me? may be regarded as having abandoned residence in the United States and as having lost my permanent resident status under the Act.
各位大侠， 如果你有这个问题， 还是注意为妙。 485 pending 期间税表到底该怎么填写？
What If You Claim Nonresident Alien Statuson Your Federal Income Tax Return?
If you are an alien who has established residence in the UnitedStates after having been admitted as an immigrant or adjusted to that of an immigrant, and are considering the filing ofa nonresident alien tax return or the non-filing of a tax returnon the ground that you are a nonresident alien, you shouldcarefully review the consequences of such actions under theImmigration and Nationality Act.
If you file a nonresident alien tax return or fail to file a taxreturn, you may be regarded as having abandoned residencein the United States and as having lost your permanentresident status under the Act. As a consequence, you may beineligible for a visa or other document for which permanentresident aliens are eligible.
You may also be inadmissible to the United States if you seekadmission as a returning resident, and you may becomeineligible for adjustment of status as a permanent resident ornaturalization on the basis of your original entry.