How can I charge a recurring monthly subscription fee?
In your Settings → Payments section, in the Merchant Setup subsection, select monthly (or any other option) in the Payment recurrence dropdown list. That’s all that differentiates a subscription from a one-time payment. Make sure you’ve assigned a price to the subscription in the Assign Prices subsection (or different prices to different types of subscriptions) and that the box Enable payments for this form at page top is checked.
Is there an option for my customers to do a 1 time charge or a monthly recurring charge?
I.e they order my product once or they have the option to get my product monthly…
Or should I do two separate form for that?
Meghan, you will need to separate forms. For the moment, forms accept either one-time or recurring payments.