Q.How to care for a Meyer lemon tree inside house
We dug up the lemon tree and brought inside for the winter. How should I care for it over the winter and when should I put back outside

Certified GKH Gardening Expert
In order for this to ever bear fruit, the roots will have to go undisturbed for quite a while. I would suggest planting this in a large container and moving it in and out in that.
You will want to supplement lighting with at least 200 watts to ensure fruit over the winter, and about 100 watts just to keep it alive and growing.
This article will give you more information about the care of citrus in container: https://www.gardeningknowhow.com/edible/fruits/lemons/growing-lemon-trees-containers.htm