How to file a second amended refund

I have one job so when I received a w2 from my old job that I wasn’t expecting I filed an amended return. Now I got another surprise tax form I wasn’t expecting (this one a 1099 no taxes were taken out) I got paid 770$ from for watching a special needs family member. But HR block won’t let me file another amended return bc I already did one and I don’t know how else to do it pls help