Hey there, Meron.
Thanks for joining us here in the Community. I'd be glad to provide some info regarding your question about creating a check from a journal entry.
While there are many ways to link and customize transactions within QuickBooks Online, there isn't currently a way to print a check from a journal entry. In this case the check would need to be individually created then printed, without directly linking info from the journal entry.
I can see how having this option could be useful in some instances. I'll be sure to pass your feedback along to the Product Development Team for review.
In the meantime, I've got a couple of articles for you that offer helpful details regarding creating checks and journals entries within the system:
Feel free to comment below if you have any other questions. Take care.