Would someone help make me a better coder?

I'm a beginner, and I was surprised that the following code works. However, I'm sure there is a more efficient method of doing this. The table is InvoiceE2021 which is a child table of Expenditures. I created a choice field called Month2021 which has 12 entries - Jan-Dec. When I select January I get a listing of all my 2021 expenditures for January. Is there anyone out there who can teach me a benter way of doing this?

if Month2021 = 1 then
select InvoicesE2021 where year(Date) = 2021 and month(Date) = 1
else
if Month2021 = 2 then
select InvoicesE2021 where year(Date) = 2021 and month(Date) = 2
else
if Month2021 = 3 then
select InvoicesE2021 where year(Date) = 2021 and month(Date) = 3
else
if Month2021 = 4 then
select InvoicesE2021 where year(Date) = 2021 and month(Date) = 4
else
if Month2021 = 5 then
select InvoicesE2021 where year(Date) = 2021 and month(Date) = 5
else
if Month2021 = 6 then
select InvoicesE2021 where year(Date) = 2021 and month(Date) = 6
else
if Month2021 = 7 then
select InvoicesE2021 where year(Date) = 2021 and month(Date) = 7
else
if Month2021 = 8 then
select InvoicesE2021 where year(Date) = 2021 and month(Date) = 8
else
if Month2021 = 9 then
select InvoicesE2021 where year(Date) = 2021 and month(Date) = 9
else
if Month2021 = 10 then
select InvoicesE2021 where year(Date) = 2021 and month(Date) = 10
else
if Month2021 = 11 then
select InvoicesE2021 where year(Date) = 2021 and month(Date) = 11
else
if Month2021 = 12 then
select InvoicesE2021 where year(Date) = 2021 and month(Date) = 12
end
end
end
end
end
end
end
end
end
end
end
end