You can create a table by clicking Table. It is also possible to upload an Excel spreadsheet or a Word file. If needed, you can also add comments below the table or the file.
SciNote is integrated with Microsoft Office Online, so you can also Open and/or Edit the file directly in SciNote.
You can even copy the whole table from Excel or Google Sheets and paste it into SciNote; the table will automatically adjust.
If none of the options above is ok for you, you can create a screenshot and add your table as an image (.png, .jpg).