One page should have only one H1 tag. so keep a check on it. if you do have more headings on your page then you can use them as H2, H3, H4, H5 & H6 heading tags.
You can use more than one H2, H3, H4, H5 and H6 headings. but there should only be one H1 heading. and also make sure to put them in ascending order.