8老師你好。今天收到綠卡。可是綠卡上的category 是錯的。我是從EB2降級到EB3，在EB3綠的，可是綠卡上code 是E26，而我的priority date 在EB2目前並不current. 娃的code是對的，E30(children of EB3). 我兩個月後要回國一周。請問：
1。需要主動聯係USCIS更正嗎？
-You need to file I-90 to get the replacement. Send the green card back with the I-90 filing and write a letter to explain what was wrong on the green card. No fee.
2. 不想file I-90，太麻煩了，可以做service request 來更正嗎？
-No.
如果能，大概要多久？
3. 在綠卡更正期間，這個錯的綠卡還能用嗎？因為要回國一周，有些擔心-After you file I-90, you can bring the I-90 filoing receipt to the local USCIS Office to get the green card stamp on your passport, then you can use the stamp to travel. You can use this card to travel, then file I-90 after you return to US. The card is valid now, but if you do not get the replacement with the correct category code, you may have potential trouble in the future when you renew your green card 10 years later or apply for the US citizenhsip.
4. 現在已經收到綠卡了，那combo card 和h1b 是否還能繼續使用，-No. You can show this card to your HR to update your file there before you return the card to USCIS. You also can use the green card stamp to work and travel (see above).
如果綠卡在更正期間？
謝謝8老師。
