Hi ​@JamieEff, welcome to the Community!

Yeh, that Updated Invoice trigger may not be the right one you’d want to use here. QuickBooks has a New Invoice Due trigger could be a better fit for this:

That trigger would allow the Zap to trigger within a set number of days before an invoice is due. If you set it to 0 I’d have thought that would then trigger the Zap on the day the invoice is due:
From there you could set the Zap to only continue to run if it’s a Monday using the approach in the community guide you referenced. However, since you only want the Zap to run on a Monday you could potentially skip the Formatter actions mentioned in that guide and just use a Delay Until (Delay by Zapier) action that’s set to delay the Zap from continuing to run until a specific time on Monday. For example:

So the overall Zap would look like this:

Hope that helps to point you in the right direction. Let us know if you get stuck at all or have any questions! 

​Hey ​@JamieEff, just checking in! 

Have you had a chance to try out my suggestion yet? If so, how did it go?

Keep us posted on your progress, want to make sure you’re all set! 

​@SamB firstly thank you so much for your input and secondly am so sorry for such a late reply but unfortunately I was taken ill and only back in front of a computer yesterday

I will be trying your suggestion in the next day or so and will report back

Thanks and apologies again

Jamie

Hi ​@JamieEff,

Just keep us on the loop so we can assist you further if needed. Thank you.

No worries at all, ​@JamieEff—thanks for the update, and I hope you’re feeling much better! Looking forward to hearing how it goes when you give it a try.