请教8老师和前辈：父母移民的financial supple document问题

帮父母申请移民，经济担保文件需要上传Income Tax Return，是不是一定要上传the whole Tax Return package or 还是只要 form 1040 就可以?

Because of the upload file size is limited to 2M, if I upload the whole package ( total 30 pages), it is impossible to compress the file to their requirement.

还是可以将这个文件分成几个部分分别上传？

谢谢！