failed to convert value from string to boolean
Best Answers

CASE
WHEN MONTH(CURDATE()) IN ('1','2','3') THEN CONCAT(RIGHT(YEAR(CURDATE()),2),'Q1')
WHEN MONTH(CURDATE()) IN ('4','5','6') THEN CONCAT(RIGHT(YEAR(CURDATE()),2),'Q2')
WHEN MONTH(CURDATE()) IN ('7','8','9') THEN CONCAT(RIGHT(YEAR(CURDATE()),2),'Q3')
WHEN MONTH(CURDATE()) IN ('10','11','12') THEN CONCAT(RIGHT(YEAR(CURDATE()),2),'Q4')
ENDTry this. it worked for me
**edit
Actually, I was able to get your original formula to work as well. I'm not sure what is causing the error.
“There is a superhero in all of us, we just need the courage to put on the cape.” Superman1 
Raj, are you in the Filter tile's formula editor there? Filter expressions must be boolean (true/false/null). You may want to use the Add Formula tile to create your quater string, and then perhaps multiple filter tiles with expressions like
my_year_quarter = '23Q2'
to separate your data into different sets (if that's what you're trying to do).
Also, it looks like you could benefit from theQUARTER
function in that formula:CONCAT(RIGHT(YEAR(CURDATE()),2),'Q',QUARTER(CURDATE()))
0
Answers

CASE
WHEN MONTH(CURDATE()) IN ('1','2','3') THEN CONCAT(RIGHT(YEAR(CURDATE()),2),'Q1')
WHEN MONTH(CURDATE()) IN ('4','5','6') THEN CONCAT(RIGHT(YEAR(CURDATE()),2),'Q2')
WHEN MONTH(CURDATE()) IN ('7','8','9') THEN CONCAT(RIGHT(YEAR(CURDATE()),2),'Q3')
WHEN MONTH(CURDATE()) IN ('10','11','12') THEN CONCAT(RIGHT(YEAR(CURDATE()),2),'Q4')
ENDTry this. it worked for me
**edit
Actually, I was able to get your original formula to work as well. I'm not sure what is causing the error.
“There is a superhero in all of us, we just need the courage to put on the cape.” Superman1 
Raj, are you in the Filter tile's formula editor there? Filter expressions must be boolean (true/false/null). You may want to use the Add Formula tile to create your quater string, and then perhaps multiple filter tiles with expressions like
my_year_quarter = '23Q2'
to separate your data into different sets (if that's what you're trying to do).
Also, it looks like you could benefit from theQUARTER
function in that formula:CONCAT(RIGHT(YEAR(CURDATE()),2),'Q',QUARTER(CURDATE()))
0 
Good catch @rco . If this is a filter tile that would explain the issue!
“There is a superhero in all of us, we just need the courage to put on the cape.” Superman0
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