谢谢8老师回答我之前的问题，再请教两个问题。
1. 如果I485, I130, I864,I765, I131表里一个问题不适用，是必须要填N/A吗？instruction里面说“If a question does not apply to you (for example, if you have never been married and the question asks, “Provide the name of your current spouse”), type or print “N/A,” unless otherwise directed.”
-Yes or leave it blank.
如果问题里有（if any），如B2没有A number就不填？-leave it blank.
但如果问题没写（if any）就必须写N/A？但是我用abode填，发现有些空要数字的话是填不进去N/A的。
2. 网上提交父亲的130，但concurrent filing邮寄I485，Part2 的Receipt Number of underlying Petition (if any) 要填吗？留空还是N/A？
-You cannot file I-130 online if you want to file I-130 and I-485 concurrently. Concurrent filing means put all the documents of boboth cases in one mail package amd mail them together.
You can file I-130 online and then, print out the receipt notice from your account, file the receipt number in I-485 and provide the receipt notice with I-485 filing.
谢谢老师指教
