Is it possible to add entries while offline? If I do a lot of entries it uses a lot of data

You may prepare the data in XLS and import them in bulk once you are online.

Hi jcgraphicdesigns. Since QuickBooks Online safely stores your data on the cloud, you'd have to have an internet connection for your data to save. If you choose to go with the option of importing your data in bulk, check out this helpful article: Import data to QuickBooks Online.

I hope this info helps. In case you have other questions, feel free to contact our support team using this link here.