Turkce´de nasil soylenir 

"Do you have any homework?"

"Have you finished your homework?"  My attempt for this sentence..ödevini bitirdin mi?

"Do you have any homework ?" = Ödevin var mı ? 

"Have you finished your homework ?"  = Ödevini bitirdin mi ? 

Do you have any homework? - Hiç ödevin var mı?

Have you finished your homework? - Ödevini bitirdin mi?

                               Or

Have you done your homework? - Ödevini yaptın mı?

yardimin icin tesekkur ederim

This might not be so polite, sorry if it isn´t. But I just want to notify about a point, which many learners get ıt wrong;

If you are responding to people (more than one person), you should better use the word yardım with plural personal pronoun: yardımınız

Also plural of yardım is acceptable (and better. I think) yardımlarınız

Anlayışınız için teşekkürler