Above mentioned are the key documents.

Here is some supporting document & items.

Make sure, you have all stuff to prove you have never been out of status.

Best luck!

Filled DS-156 form

DS-157 (If applicable)

$100 Application Fee

Passport with previous visas.

2x2 inches photos

Your initial H1B application Package from HR.

Other:

4. Previous I-20/Transcripts


5. Tax returne document


6. Bank Statement


7. EAD card from your OPT

我近期也想回国，问一下那个H1表，是不是申请签证的时候整张表都要交？但是美国出关的时候旧的I94表连同新的I94表（H1表右下角）都要交出去吗？

另外，LG（F1)的材料要准备吗？