If I used my parents address instead of mine to file and as head of household will it cause issues for them when they go to file as HOH? I've already filed.

[MichaelDC]

If your parents’ address is your preferred mailing address, use it.  You can use any address that you wish on your tax return. Your parents probably file Married Filing Jointly. Married filers can't file as Head of Household.

Keep in mind that if the IRS or your state department of revenue needed to contact you about your return, they would use the address on the tax return.