# Tag Formulas

- [Global tags](https://docs.portant.co/portant-docs/personalise-documents/tag-formulas/global-tags.md): These are tags that can be used in any document
- [Tag Formulas](https://docs.portant.co/portant-docs/personalise-documents/tag-formulas/tag-formulas.md): Sometimes you might need to calculate values within your document template. Within Portant you can add calculations directly within tags simply by include = at the beginning of the tag.
- [Tag IF Statements](https://docs.portant.co/portant-docs/personalise-documents/tag-formulas/tag-if-statements.md)


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