Undefined error in SQL Server Code before "IF" - sql-server

Question

I'm obviously new to this and I need some help. I have this code in SQL Server Management Studio.
The error that I get is
Msg 156, Level 15, State 1, Line 38
Incorrect syntax near the keyword 'IF'
If I execute direct select statement instead of using "If" the query is successfully executed.
Please point out what I am missing and where is my mistake.
Thanks a lot.
declare #dateFrom [date] = cast(dateadd(day, -7, getdate()) as [date]);
declare #dateTo [date] = cast(dateadd(day, 28, getdate()) as [date]);
declare #prTypeCode [varchar](10) = null;
declare #ExcludeA [bit] = 0 ;
declare #ExcludeB [bit] = 0;
;with distribution as
(
select *
from [schema1].[Table1]
),
product as
(
select *
from [schema1].[Product]
),
fint as
(
select
*,
(case when CHARINDEX('0%', FIN_ CODE) > 0 then 1 else 0 end) as ZFlag
from [schema1].[FinTab]
),
deal as
(
select
*,
case when (AG_ID = 5 or DE_ID = 6) then 1
else 0 end as Ex_flag
from
[P_ BASE1].[ schema2].[table3]
),
dealersn as
(
select distinct *
from [P_ BASE1].[ schema2].[table4]
),
regionN as
(
select distinct *
from [P_ BASE1].[ schema2].[table5]
),
final as
(
select
d.PRODUCT_CODE, p.PR_NAME, p.PR_TYPE_CODE, p.PR_ACTIVE,
d.FIN_TABLE_CODE, ft.FT_NAME, ft.FT_ACTIVE,
cast(d.SND_TO_DATE as [date]) as SND_TO_DATE,
count(d.SN_ID) as SHOP_COUNT,
min(ft.ZFlag) as ZFlag,
min(ds.Ex_flag) as ExFlag, dn.SND_FULLNAME,rn.REG_NAME
from
distribution d
left outer join
product p on p.PRODUCT_CODE = d.PRODUCT_CODE
left outer join
fint ft on ft. FIN_ CODE = FIN_ CODE
left outer join
deal as ds On d.SN_ID = ds.SHOP_ID
left outer join
dealersn as dn on d.SN_ID = dn.SN_DATA_ID
left outer join
regionN as rn ON ds.REGION_ID = rn.REGION_ID
where
d.SND_TO_DATE between #dateFrom and #dateTo
and (#prTypeCode is null or p.PR_TYPE_CODE = #prTypeCode)
group by
rn.REG_NAME, ds.REGION_ID, ds.SHOP_ID, d.PRODUCT_CODE, p.PR_NAME,
p.PR_TYPE_CODE, p.PR_ACTIVE, d.FIN_TABLE_CODE, ft.FT_NAME,
ft.FT_ACTIVE, d.SND_TO_DATE,dn.SND_FULLNAME
)
IF (#ZeroPercent = 0 AND #LargeChainsOrTushev = 0)
BEGIN
SELECT DISTINCT *
FROM final
WHERE ZFlag = 0 AND ExFlag = 0
END
ELSE
IF #ZeroPercent = 1 AND #LargeChainsOrTushev = 0
BEGIN
SELECT DISTINCT *
FROM final
WHERE ZFlag = 1 AND ExFlag = 0
END
ELSE IF #ZeroPercent = 0 AND #LargeChainsOrTushev = 1
BEGIN
SELECT DISTINCT *
FROM final
WHERE ZFlag = 0 AND ExFlag = 1
END
ELSE
BEGIN
SELECT DISTINCT *
FROM final
END

Answer 1

You have a with statement that "defines" a bunch of tables, the last of which is called final. This is called a CTE (Common Table Expression). You can use CTEs for many reasons, but the important thing is, you have to use the CTE in a query. Instead you define the CTE and then...do nothing.
If you put a line like this:
select * from final
just after the CTE (before the IF), it will run.