请小白兔看过来,其他大侠也请指点

LD有一份H1工作,我一直都在读书,最近我毕业找到工作,单位给办绿卡,我要递I-485了,单位律师给的CHECKLIST里面要求我填I-134.我的485是EMPLOYMENT-BASED不是FAMILY-BASED,我需要为我LD填I-134表吗?在我印象中只有是因为婚姻或者亲属绿卡才需要填什么I-134或者I-864之类的
Form:I-134, Affidavit of Support

To file a promise with USCIS to support an alien entering the United States and that the alien will not become a public charge. A separate affidavit must be filed by the sponsor for each person.

或者还是让我LD的老板写封EMPLOYMENT LETTER证明他有一份H1的工作不会成为公众的负担就行了?请大家指教,我先谢谢了.