Hi!

We want to switch our timekeeping service to Odoo to track our employees' attendance. During testing, I found that overtime is automatically calculated. However, there are some issues with the calculation that make this feature unusable for us:

• If an employee doesn't create an attendance entry on the day that they are supposed to work (e.g. a regular Monday, 9-5), no "negative" overtime will be calculated.
• We pay different overtime rates depending on factors like working on weekends or state holidays.

Ideally, we would like to adapt the existing formula to take these factors into account, but I'm not sure if that is even possible.

We are currently using Odoo Online (SaaS). Is it possible to modify stock modules for this type of hosting, or would we need to switch to something like Odoo.sh? If it is possible, could someone point me in the right direction documentation-wise and tell me if there are any best practice examples for doing things like this to avoid losing any changes during future upgrades?

Thanks in advance!